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Home DSL Tahoe G.SHDSL.bis Tahoe 681/682/684 Modems

Tahoe 681/682/684 G.SHDSL+ Modems

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Tahoe 681/682/684 - G.SHDSL+ Modems with FastEthernet interface

G.SHDSL+ Modems with FastEthernet interface

Tahoe 681 and Tahoe 682 modems take advantage of the latest G.shdsl technology providing unprecedented possibilities for copper leased lines. They achieve throughputs of nearly 11.4 Mbps (symmetrical) on the distance of a few kilometres - faster and further than any other modem technology. Developed to combine performance, quality, and scalability, the Tahoe range of next generation DSL modems take advantage of the latest G.SHDSL technology to help address customers’ needs for greater bandwidth while using existing copper infrastructure. The Tahoe 681 uses a single pair of copper cabling achieving data rates up to 5.7Mbps. The Tahoe 682 uses two pairs of copper cabling with speeds of up to 11.4Mbps. The Tahoe 684 uses four pairs of copper cabling achieving speeds up to 22.8Mbps. The modem has a built-in TCP/IP router and an Ethernet 10/100Base-T interface allowing connection directly to a LAN. The Tahoe is manageable using telnet, SNMP, serial console or built-in LCD and keyboard. Traffic statistics are available through the embedded HTTP server while Modem status messages can be sent to a central server using the syslog protocol. Further advanced features include automatic traffic balancing between DSL lines, the ability to configure individual line rates on each transmission line to cater for differences between line pair quality. The modems will also continue to operate should pairs fail, a feature that sets this product apart from its peers.

Here's an example application diagram for the Tahoe 681/682:

The Benefits:

  • Throughputs of 10Mbps (symmetrical) over significant lengths of copper cabling.
  • DHCP/BOOTP server allows computers and other networked hardware to be configured automatically.
  • DHCP/BOOTP Relay Agent allows even large networks based on dynamic allocation of IP addresses to be easily managed using a single server.
  • Firmware upgrade using TFTP.
  • Additional protection against unauthorized LAN access.

Features:

  • 11.4Mbps Operation over 2 pairs of copper
  • 5.7Mbps Operation over 1 pair of copper
  • Utilises very latest G.SHDSL+ standard
  • Bridging and Routing functionality
  • NAT, DHCP, VLAN support
  • Management via LCD,HTTP, TELNET & VT-100
  • Measurement of inside temperature
  • Serial console management
  • For use in conjunction with BT's EPS8 and EPS9 circuits

The Tahoe 684 is a new member of the successful Tahoe G.shdsl+ family providing even greater throughputs of nearly 22.8Mbps (symmetrical) on the distance of a few kilometres.

Here's an example application diagram for the Tahoe 684:

Apart from typical G.shdsl modulations the Tahoe 684 supports TCPAM-32 coding - much more efficient than the standard TCPAM-16, giving higher throughputs and higher reach.

Features:

  • Built-in TCP/IP router
  • NAT/masquerade
  • firewall
  • built-in LCD and keyboard for easy configuration
  • telnet and SSH management
  • SNMP management
  • serial console management
  • DHCP/BOOTP server (dynamic assigning of IP addresses and other parameters to each network station)
  • DHCP/BOOTP Relay Agent (relaying of the DHCP/BOOTP requests to a central server)
  • firmware upgrade using TFTP
  • managed or unmanaged bridge functionality
  • logging through syslog
  • 802.1q VLAN support
  • additional protection against unauthorized LAN access
  • inside temperature measurement
  • automatic traffic balancing among four DSL lines
  • individual throughput settings for each line (in case of quality differences between the lines)
  • automatic fall back to 6-, 4- or 2-wire transmission in case of line failure
  • For use in conjunction with BT's EPS8 and EPS9 circuits

Specifications:

Standards: G.shdsl, conforms to IT U G.991.2
Throughput:

  • up to 22.8 Mbps on a 8-wire (4-pair) line
  • symmetrical speed, i.e. 2 2.8 Mbps upload and 22.8 Mbps download at the same time

Modulation:

  • TCPAM-32
  • up to 30% higher reach i n comparison to HDSL

Interface: Ethernet 10/100 Base-T
Processor: Motorola PowerPC 100 M Hz
Memory: 4MB SDRAM, 1MB Flash
Efficiency: up to 15,000 packets per second
Network Protocols: TCP, IP, UDP, ICMP, TFTP, SNMP, DHCP, BOOTP, PPP, Frame Relay, HDLC, Cisco® HDLC, IEEE 802.1q
WAN Encapsulation: ATM AAL5
Dimensions: 200 mm (width) x 130 m m (length) x 45 mm (height)
Power Supply: 15V, 700 mA, 11W, external 100-240VAC/5 0 -60Hz power supply included

Available in the range:

Tahoe DSLAM: 19", 3U high, rack-mountable DSLAM
Tahoe 681: Single pair of copper cabling achieving data rates up to 5.7Mbps.
Tahoe 682: The Tahoe 682 uses two pairs of copper cabling with speeds of up to 11.4Mbps.
Tahoe 684: The Tahoe 684 uses four pairs of copper cabling achieving speeds up to 22.8Mbps.

 

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